John,
I'm connecting the BD20s to Atlas' universal signal control board
via three wires, one logic, one common, one power.? the Atlas
boards in turn have two other posts that use 5 volt power to light
the Atlas signal itself.
BIll
On 9/27/21 9:52 AM, John Eldridge
wrote:
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Hi Bill,?
?
Have been following this topic of your ¡°Spacing between NCE
BD20 detectors¡± question, and have some questions that I have
not seen
asked or answered.?
?
1. Are you using a NCE AIU to receive the signal from the
BD20 to encode the Block Occupancy to your DCC system? If not,
what is your interface?
?
2. If you are using AIU¡¯s to read your BD20's, does the LED
on the AIU for the BD20 in question NOT light, while LED¡¯s for
other BD20's do light??
?
2. Based on your reply to Don Weigt, am I correct that you
are using only Pin 2 ¡°Logic +¡± terminal + Pin 1 ¡°Ground¡± on the
BD20 to your interface??
?
Please advise, as I have been using BD20's connected with
pins 2 & 1 only toAIU interfaces quite successfully for over
a year.
?
John Eldridge
Texas
